JavaScript拖动层Div代码

2019-11-19 17:22:04

字体：大中小

来源：转载

供稿：网友

效果图：（灰色区域可拖动）

代码如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><style type="text/css">*{ margin:0; padding:0;} .div{ width:100px; height:100px; position:absolute;left:100px; top:100px; background:#ccc;}</style></head><body> <div class="div"> </div> <script type="text/javascript">  var div = document.getElementsByTagName('div')[0];  var zIndex = 6;  drag(div);  div.ondblclick = function() {  alert("ok");  };  function drag(oDrag) {  var disX = dixY = 0;  oDrag.onmousedown = function(event) {   var event = event || window.event;   disX = event.clientX - this.offsetLeft;   disY = event.clientY - this.offsetTop;   var oTemp = this.cloneNode(true);   document.body.appendChild(oTemp);   document.onmousemove = function(event) {   var event = event || window.event;   var iL = event.clientX - disX;   var iT = event.clientY - disY;   var maxL = document.documentElement.clientWidth - oDrag.offsetWidth;   var maxT = document.documentElement.clientHeight - oDrag.offsetHeight;   iL <= 0 && (iL = 0);   iT <= 0 && (iT = 0);   iL >= maxL && (iL = maxL);   iT >= maxT && (iT = maxT);   oTemp.style.zIndex = zIndex++;   oTemp.style.opacity = "0.5";   oTemp.style.filter = "alpha(opacity=50)";   oTemp.style.left = iL + "px";   oTemp.style.top = iT + "px";   return false;   };   document.onmouseup = function() {   document.onmousemove = null;   document.onmouseup = null;   oDrag.style.opacity = oTemp.style.opacity;   var arr = {    left: oTemp.offsetLeft,    top: oTemp.offsetTop   };   oDrag.style.zIndex = oTemp.style.zIndex;   oAnimate(oDrag, arr, 300,   function() {    document.body.removeChild(oTemp);   });   oDrag.releaseCapture && oDrag.releaseCapture()   };   this.setCapture && this.setCapture();   return false  }  }  function oAnimate(obj, params, time, handler) {  var node = typeof obj == "string" ? $(obj) : obj;  var _style = node.currentStyle ? node.currentStyle: window.getComputedStyle(node, null);  var handleFlag = true;  for (var p in params) { (function() {   var n = p;   if (n == "left" || n == "top") {    var _old = parseInt(_style[n]);    var _new = parseInt(params[n]);    var _length = 0,    _tt = 10;    if (!isNaN(_old)) {    var count = _old;    var length = _old <= _new ? (_new - _old) : (_old - _new);    var speed = length / time * _tt;    var flag = 0;    var anim = setInterval(function() {     node.style[n] = count + "px";     count = _old <= _new ? count + speed: count - speed;     flag += _tt;     if (flag >= time) {     node.style[n] = _new + "px";     clearInterval(anim);     if (handleFlag) {      handler();      handleFlag = false;     }     }    },    _tt);    }   }   })();  }  } </script> </body></html>

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